Use the information given in question 57 of Chap. 13, and construct a 95 %

confidence interval for both a and b.

Question 57 of Chap. 13

The Department of Accounting at a university is interested in the relationship between SAT score and graduating grade point average (GPA). The accompanying table presents a summary of the data it has collected.

(a) Draw a scatter diagram for these data.

(b) Estimate the regression parameters α and β.

Transcribed Image Text:

SAT, x 600 420 750 650 550 680 = 3650 360000 176400 562500 422500 302500 462400 = 2286300 GPA y 3.2 2.5 3.9 3.6 3.4 3.7 Sy= 20.3 AV 1920 1050 2925 2340 1870 2516 = 12621 ye 10.24 6.25 15.21 12.96 11.56 13.69 2y = 69.91